Joseph herrburger



(No Model.)

J. HERRBURGER.

PILOT FOR PIANO ACTIONS. No. 482,008. Patented Sept. 6, 1892.

' INVENTOH gfimfiw ATTOHNEKS.

UNITED STATES PATENT OFFICE.

JOSEPH HERRBURGER, OF PARIS, FRANCE.

PILOT FOR PlANO-ACTIONS.

SPECIFICATION forming part of Letters Patent No. 482,008, dated September 6, 1892.

Application filed June 30, 1892. Serial No. 438,496. (No model.)

To all whom it may concern.-

Be it known that I, JOSEPH HERRBURGER, of Paris, France, have invented an Improved Pilot for Piano-Actions, of which the following is a specification.

This invention relates to an improved construction of pilot for piano-actions, which is an adjusting device beneath the abstract that takes the place of the rocker.

It consists in the various features of improvement more fully pointed out in the claims.

In the accompanying drawings, Figure 1 is an elevation of a piano-action provided with ceived by the central perforation of an annular head 6 and is then upset to connect the parts. The threaded lower end of the pilot is driven into the key a by revolving the pilot I5 my improved pilot. Fig. 2 is an elevation of rately adjusted, readily centered, and cheaply the pilot; Fig. 3, a longitudinal section of the manufactured. shank detached; Fig. 4, a top view of the \Vhat I claim is head detached; Fig. 5, a cross-section on line 1. A pilot for piano-actions, consisting of a 50 mm, Fig. 2. shank having a threaded lower section, a 20 The letter a represents the key of the pianosquared upper section, a contracted neck, and action. b is the abstract, 0 the whip, (Z the an annular head that receives such neck, jack, and e the hammer-butt, all as usual. substantially as specified. Into the key a there is screwed the pilot A, 2. The combination of a key and abstract 55 directly beneath the abstract, and by means in a piano-action with an interposed pilot 25 of which the elevation of the abstract, and consisting of a shank having a threaded lower consequently the engagement of the jack section, a squared upper sect-ion,acontracted with the hammer-butt, is regulated. neck, and an annular head that receives such The pilot A consists of a shank that is neck, substantially as specified. threaded at its lower end, as at e, and is JOSEPH HERRBURGER. 3o squared at its upper end, as at 6. Above the Witnesses:

squared end 6' the shank terminates in a con- EDWIN BEOHSTEIN, tracted neck e This contracted neck is re- H. \VYLE. 

